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← ScienceWhich consequence results when exceeding the design flow rate in centrifugal pumps?
A)Increased radial thrust on impeller shaft✓
B)Reduced net positive suction head
C)Improved pump efficiency overall rating
D)Decreased power consumption of the motor
💡 Explanation
Increased radial thrust occurs because asymmetrical pressure distribution on the impeller causes turbulence within the pump casing. Therefore, increased radial thrust happens, rather than improved efficiency or reduced power, because hydraulic imbalances arise under off-design conditions.
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